printToFileを使った例

gistfile1.scala

// http://stackoverflow.com/questions/4604237/how-to-write-to-a-file-in-scala
    FileUtils.printToFile(tempFile)(writer => {
      val it = Source.fromFile(conf).getLines()
      for (line <- it) {
	startPattern.findFirstIn(line) match {
          case Some(_) =>
            while (it.hasNext && it.next.length != 0) {}
          case _ =>
            writer.println(line)
	}
      }
    })